Importance of very fine roots in deep soil layers for the survival of rainfed olive trees

Conceição, Nuno; Tezza, Luca; Lourenço, Sónia; Häusler, Melanie; Boteta, Luís; Pacheco, Carlos Arruda; Ferreira, Maria Isabel

doi:10.17660/actahortic.2018.1199.9

Cited by 9 publications

(3 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The fact that we used olive trees for this experiment comes from the experience gathered during a 3 years experiment with rained and irrigated olive orchards, dedicated to analyse water use (Conceição et al, 2017(Conceição et al, , 2018 and the role of HR (Nadezhdina et al, 2014;Ferreira et al, 2012bFerreira et al, , 2013Ferreira et al, , 2018. Those experiments considered in an integrated analysis show that the olive trees capacity of surviving under atmospheric and edaphic stress is highly explained by the ability to uptake water from much larger soil volumes than those usually considered.…”

Section: Discussionmentioning

confidence: 99%

Exploring hydraulic redistribution for water management in gardens

Lourenço¹,

Ferreira²

2020

Acta Hortic.

Self Cite

View full text Add to dashboard Cite

The understanding of water use by mixed stands, where trees and herbaceous share the same area, as in landscaping, requires at least the combined consideration of the role of water and radiation, as limiting factors for plant development and survival. Hydraulic redistribution (HR), a mechanism of transport of water between different root zones via roots, is of high interest in this context. Several studies in last decades, using bidirectional sap flow sensors in roots, and other tools, unlighted the role of this survival mechanism in potentially critical hydro-climatic conditions, i.e., when plants are subjected to severe water stress. Woody plants can act as water transporters from underground deep layers to shallow soil layers, via their deep roots, as a result of water potential gradients. Results from literature suggest that in doing so (HR) deep rooted plants not only ensure conditions for their own survival but also that, at certain stages, they increase the survival chances for other plants installed in nearby shallow layers. Our hypothesis is that synergies between species exploring water from different soil layers can be identified in a simple experiment, the results being of potential interest for garden planning. We show preliminary results obtained with olive trees in Mediterranean climatic conditions, and associated herbaceous plants, in a kind of splitroot experiment. Water status of herbaceous plants in three different conditions was evaluated from leaf water potential and stomatal conductance. The results confirm our hypothesis in that herbaceous plants were significantly affected by water applied to part of the root system, even if not receiving irrigation directly. This mechanism should be taken into account when creating sustainable urban gardens, in respect to water management.

show abstract

Section: Discussionmentioning

confidence: 99%

Exploring hydraulic redistribution for water management in gardens

Lourenço¹,

Ferreira²

2020

Acta Hortic.

Self Cite

View full text Add to dashboard Cite

show abstract

“…No olival regado, um ciclo de stress foi induzido em 2011, por 6 semanas, tendo a evapotranspiração (ET) e a transpiração (T) sido medidas (Conceição et al, 2017) e tendo a ET relativa, para a estimativa do coeficiente de stress, sido avaliada através de sensores de fluxo de seiva, o que permitiu estabelecer uma função de stress (Ferreira et al, 2012b). Para a análise da dinâmica da absorção radicular usaram-se (1) medições do teor de água no solo feitas com sonda de neutrões em tubos dispostos na parcela regada (Ferreira et al, 2012b) e na parcela de sequeiro (Conceição et al, 2018) e, por outro lado, usaramse (2) medições do fluxo de seiva em raízes, para cujo efeito se instalaram sensores pelo método da deformação do campo de temperaturas (Heat Field Deformation Method HFDM, Nadezhdina et al, 2014) e pelo método de impulsos de calor compensado (Calibrated Average Gradient, CAG, Green et al, 1997;Green et al, 2003, Testi andVillalobos, 2009) com uma modificação específica descrita no anexo técnico de Ferreira et al (2018).…”

Section: Materiais E Métodosunclassified

Horticultura Do Maranhão Português Nos Séculos Xvii E Xix: Contribuições Da Pesquisa Documental a Partir Das Obras Dos Missionários Cristóvão De Lisboa E Francisco De Nossa Senhora Dos Prazeres

Linhares¹,

Rodrigues²,

Costa³

2021

Ciências Agrárias, Indicadores E Sistemas De Produção Sustentáveis 2

View full text Add to dashboard Cite

show abstract

“…The choice and success of DI strategy is conditioned by tree density and rootzone size. It seems that SDI is more interesting when trees explore large volumes of soil, as in low-density orchards that maximize the availability of stored soil water per tree, compared to higher densities [97,104]. Moreover, the success of SDI as compared to FI depends on the crop load of olive.…”

Section: Olive Response To Water Deficitmentioning

confidence: 99%

Deficit Irrigation in Mediterranean Fruit Trees and Grapevines: Water Stress Indicators and Crop Responses

Fernandes-Silva¹,

Oliveira²,

Paço³

et al. 2019

Irrigation in Agroecosystems

View full text Add to dashboard Cite

In regions with Mediterranean climate, water is the major environmental resource that limits growth and production of plants, experiencing a long period of water scarcity during summer. Despite the fact that most plants developed morphological, anatomical, physiological, and biochemical mechanisms that allow to cope with such environments, these harsh summer conditions reduce growth, yield, and fruit quality. Irrigation is implemented to overcome such effects. Conditions of mild water deficit imposed by deficit irrigation strategies, with minimal effects on yield, are particularly suitable for such regions. Efficient irrigation strategies and scheduling techniques require the quantification of crop water requirements but also the identification of pertinent water stress indicators and their threshold. This chapter reviews the scientific information about deficit irrigation recommendations and thresholds concerning water stress indicators on peach trees, olive trees, and grapevines, as case studies.

show abstract

Importance of very fine roots in deep soil layers for the survival of rainfed olive trees

Cited by 9 publications

References 5 publications

Exploring hydraulic redistribution for water management in gardens

Exploring hydraulic redistribution for water management in gardens

Horticultura Do Maranhão Português Nos Séculos Xvii E Xix: Contribuições Da Pesquisa Documental a Partir Das Obras Dos Missionários Cristóvão De Lisboa E Francisco De Nossa Senhora Dos Prazeres

Deficit Irrigation in Mediterranean Fruit Trees and Grapevines: Water Stress Indicators and Crop Responses

Contact Info

Product

Resources

About